LEASES - Components of Lease Right-of-Use Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Mar. 31, 2020
Assets
Operating lease, right-of-use assets	$ 70,443	$ 78,963
Liabilities
Operating lease liabilities, current	12,691	5,875
Operating lease liabilities, non-current	85,379	92,452
Total operating lease liabilities	$ 98,070	$ 98,327